media: Bulk remove BUG_ON(in_interrupt())

None of these BUG_ON()'s is justified. BUG_ON() should only be used when
there is really no way to survive.

If at all these could be replaced by lockdep_assert_preemption_enabled() to
cover all invalid caller context and not just those covered by
in_interrupt().

But all functions which are invoked from those places contain already debug
mechanisms to catch wrong context, so having these extra checks is not
having any advantage.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/common/saa7146/saa7146_fops.c b/drivers/media/common/saa7146/saa7146_fops.c
index d653187..e936c56 100644 (file)
--- a/drivers/media/common/saa7146/saa7146_fops.c
+++ b/drivers/media/common/saa7146/saa7146_fops.c
@@ -55,8 +55,6 @@ void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
        struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
        DEB_EE("dev:%p, buf:%p\n", dev, buf);
 
-       BUG_ON(in_interrupt());
-
        videobuf_waiton(q, &buf->vb, 0, 0);
        videobuf_dma_unmap(q->dev, dma);
        videobuf_dma_free(dma);

diff --git a/drivers/media/pci/bt8xx/bttv-risc.c b/drivers/media/pci/bt8xx/bttv-risc.c
index 4af7282..32fa4a7 100644 (file)
--- a/drivers/media/pci/bt8xx/bttv-risc.c
+++ b/drivers/media/pci/bt8xx/bttv-risc.c
@@ -572,7 +572,6 @@ bttv_dma_free(struct videobuf_queue *q,struct bttv *btv, struct bttv_buffer *buf
 {
        struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
 
-       BUG_ON(in_interrupt());
        videobuf_waiton(q, &buf->vb, 0, 0);
        videobuf_dma_unmap(q->dev, dma);
        videobuf_dma_free(dma);

diff --git a/drivers/media/pci/cx23885/cx23885-core.c b/drivers/media/pci/cx23885/cx23885-core.c
index 4b0c53f..16eb4ab 100644 (file)
--- a/drivers/media/pci/cx23885/cx23885-core.c
+++ b/drivers/media/pci/cx23885/cx23885-core.c
@@ -1322,7 +1322,6 @@ void cx23885_free_buffer(struct cx23885_dev *dev, struct cx23885_buffer *buf)
 {
        struct cx23885_riscmem *risc = &buf->risc;
 
-       BUG_ON(in_interrupt());
        pci_free_consistent(dev->pci, risc->size, risc->cpu, risc->dma);
 }
 

diff --git a/drivers/media/pci/cx25821/cx25821-core.c b/drivers/media/pci/cx25821/cx25821-core.c
index 55018d9..6f8ffab 100644 (file)
--- a/drivers/media/pci/cx25821/cx25821-core.c
+++ b/drivers/media/pci/cx25821/cx25821-core.c
@@ -1198,7 +1198,6 @@ EXPORT_SYMBOL(cx25821_risc_databuffer_audio);
 
 void cx25821_free_buffer(struct cx25821_dev *dev, struct cx25821_buffer *buf)
 {
-       BUG_ON(in_interrupt());
        if (WARN_ON(buf->risc.size == 0))
                return;
        pci_free_consistent(dev->pci,

diff --git a/drivers/media/platform/fsl-viu.c b/drivers/media/platform/fsl-viu.c
index 4f2a0f9..ff62530 100644 (file)
--- a/drivers/media/platform/fsl-viu.c
+++ b/drivers/media/platform/fsl-viu.c
@@ -381,8 +381,6 @@ static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf)
        struct videobuf_buffer *vb = &buf->vb;
        void *vaddr = NULL;
 
-       BUG_ON(in_interrupt());
-
        videobuf_waiton(vq, &buf->vb, 0, 0);
 
        if (vq->int_ops && vq->int_ops->vaddr)

diff --git a/drivers/media/usb/tm6000/tm6000-video.c b/drivers/media/usb/tm6000/tm6000-video.c
index 2df736c..3f650ed 100644 (file)
--- a/drivers/media/usb/tm6000/tm6000-video.c
+++ b/drivers/media/usb/tm6000/tm6000-video.c
@@ -693,8 +693,6 @@ static void free_buffer(struct videobuf_queue *vq, struct tm6000_buffer *buf)
        struct tm6000_core   *dev = fh->dev;
        unsigned long flags;
 
-       BUG_ON(in_interrupt());
-
        /* We used to wait for the buffer to finish here, but this didn't work
           because, as we were keeping the state as VIDEOBUF_QUEUED,
           videobuf_queue_cancel marked it as finished for us.

diff --git a/drivers/media/usb/zr364xx/zr364xx.c b/drivers/media/usb/zr364xx/zr364xx.c
index d65d3c2..1e1c6b4 100644 (file)
--- a/drivers/media/usb/zr364xx/zr364xx.c
+++ b/drivers/media/usb/zr364xx/zr364xx.c
@@ -357,8 +357,6 @@ static void free_buffer(struct videobuf_queue *vq, struct zr364xx_buffer *buf)
 {
        _DBG("%s\n", __func__);
 
-       BUG_ON(in_interrupt());
-
        videobuf_vmalloc_free(&buf->vb);
        buf->vb.state = VIDEOBUF_NEEDS_INIT;
 }